Research On Theory, Methods And System Realization Of Real-time Operating-Control Of River Basin Water Resources

In the recent years, the lasting dry flow of Yellow River is observed, which results in the risk of dry-off in the lower reaches and the insufficient water supply to society. Under this condition, the researches on real-time schedule methodology, models and system for the arid areas are becoming more and more critical and urgent. Therefore, this paper focuses on the real-time multiple-dimensional water resources regulating and control, with example of Yellow River Basin. The essential problems solved by this research include follows.1 Comprehensive study on dry flow routine time and water lossThe basic situation has been studied for the reaches below Xiaolangdi, including the reach-node definition, flow level classification, and mainly concentrating in determination of operable results of the routine time and losses of dry-flow with application of historical data analysis and prototype experiments. Comparing the results from historical data analysis and prototype experiments, the both results are observed to be consistent, therefore it is proved that the results obtained are confident and concise.2 Research on the dry-flow routine method for the complex and long-distance channelwith short intervalFor the dry-flow routine method for the complex and long-distance channel with short interval, the multiple-factor linear flow routine method, one-dimension unsteady flow routine method and artificial neural net flow routine method is mainly studied, the corresponding models have been developed. The differences between the three methods have been studied as well. The multiple-factor linear flow routine method is with basic concept, clear computation procedure, precise flow routine coefficients obtainable by optimization, and is stable and easy to implement the routine calculation and feedback control. The actual application shows the multiple-factor linear flow routine method is suitable for the lower reaches and with satisfied precision; therefore, it is applied in this research.3 Research on the river basin water resources multiple-dimension and critical real-time operating model and method with multiple time-step nesting and rolling-amendmentThe multiple-dimensional critical real-time operating is put forward. With application of control theory and critical operating and control theory, the concept, characteristics and procedures of river basin water resources multiple-dimension and critical real-time operating are analyzed, its model structures are studied as well.With example of reaches below Xiaolangdi, the River basin water resources multiple-dimension and critical real-time operating model with multiple time-step nesting and rolling-amendment has been developed, considering the operation of Xiaolangdi Reservoir, inflow, water diversion, local inflow and dry-flow routine and etc. The month-step, lOday-step and day-step nesting, rolling and real-time decision making are applied in the model. The prevention of the dry-off at Lijin is considered as the control condition, the month regulating model, lOdays regulating model and dayregulating model, the model for prevention and alarm of ice-jam and dry-off have been developed.4 Study and development of river basin multiple-dimensional critical real-time operating and control Decision Support SystemWith example of basin multiple-dimensional critical real-time operating and control Decision Support System for the reaches below Xiaolangdi, the research and development of basin multiple-dimensional critical real-time operating and control Decision Support System for the reaches below Xiaolangdi have been illustrated, with emphasis of comprehensive structure, database setup and management sub-system, space analysis system basing GIS and regulation flowchart, etc.The development of regulation flowchart is an innovation of DSS, which couples the database, modelbase, regulation flowchart needed according to different seasons. The spring regulation flowchart, summer regulation flowchart, autumn regulation flowchart and winter regulation flowchart have been developed separately and then integrated. The regulation flowcharts controlled by general interface improve the efficiency and convenience of decision making. Furthermore, the interacting vision system basing on 3D-GIS has been also explored and applied for a trial.